In thin AP networking, which of the following authentication methods does not require AC participation in the authentication process?

Question

Options

• AShared Key Authentication
• B802.1X authentication
• CPSK authentication
• DPortal authentication

• A
  70% (19)
• B
  11% (3)
• C
  4% (1)
• D
  15% (4)

Explanation

Shared Key Authentication (WEP-based) operates entirely at the 802.11 link layer between the client and the AP itself, meaning the AP can complete the challenge-response handshake using its locally stored key without forwarding anything to the AC. The other three options all require AC involvement: 802.1X requires the AC to act as an authenticator or RADIUS proxy, relaying EAP messages between the client and the authentication server; PSK authentication in a thin AP environment requires the AC to perform the four-way handshake validation since thin APs offload security processing to the controller; and Portal (captive portal) authentication requires the AC to intercept HTTP traffic, redirect users to the login page, and authorize access after credentials are verified.

Memory tip: Shared Key Authentication predates the thin AP/controller architecture entirely - it was designed for standalone APs and works the same way with or without a controller, which is exactly why the AC has nothing to do with it.

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